在PHP中通过id mysql求和

Question

i want to sum all total_harga by id_subkategori, how i caan get that? so just get for example all id_subkategori 5 get sum my database table

Answer 1

You can use GROUP BY id_subkategori to get the desired output.

select sum(total_harga) total, id_subkategori
from yourtable
group by id_subkategori

You can read more on aggregate functions here

Edit:

If you want to pick for a specific id_subkategori, you need to change it like following.

select sum(total_harga) total, id_subkategori
from yourtable
where id_subkategori=5
group by id_subkategori

Answer 2

Use a sql statement to sum the total.

select sum(total_harga) total
from yourtable
where id_subkategori = 5
group by id_subkategori

Then fetch the sql result by PHP. Please check this for your reference.